no! do not run E85 unless it is specified on your vehicule, it'll say something like flex fuel or bio fuel acceptable, either way I would not run it period, its not good on your engine, and its over all a terrable fuel supply.

I just bought a used 2005 GNC 2500HD Sierra truck. However I cannot locate the switch that toggles you between the Odometer and other functions. I am only seeing the MPG reading and the Manual says ...

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